复利计算器单元测试

Posted 2020-06-30 05卢琪

针对复利计算器的单元测试程序

单元测试场景:

　　1.测试计算公式是否正确

　　2.测试用户输入非法字符

　　3.测试输入为空

　　4.测试输入字符串长度为0

详细源程序：https://github.com/425221830/CompoundInterestCalculator

单元测试代码

 1 package pers.xisven.test;
 2 
 3 import static org.junit.Assert.*;
 4 
 5 import org.junit.Test;
 6 
 7 import pers.xisven.cic.Calculate;
 8 
 9 public class CalculateTest {
10     String p = "10000";//P：本金
11     String i = "0.030";//I：利率
12     String n = "30";//N：存入年限
13     String c = "1";//C: 年复利次数
14     String f = "0";//F：复利终值
15     
16     Calculate calculate = new Calculate(p, i, n, c, f);
17     
18 
19     @Test
20     //测试求复利公式
21     public void testCalculateCompoundInterest() {
22         assertEquals(new Calculate(p, i, n, c, f).calculateCompoundInterest(), "24272.6247");
23     }
24     @Test
25     //测试求单利公式
26     public void testCalculateSimpleInterest() {
27         assertEquals(new Calculate(p, i, n, c, f).calculateSimpleInterest(), "19000.0000");
28     }
29     @Test
30     //测试求利率
31     public void testCalculateI() {
32         assertEquals(new Calculate("1000", null, "5", "1", "1200").calculateI(), ".0371");
33     }
34     @Test
35     //测试求本金
36     public void testCalculatePrincipal() {
37         assertEquals(new Calculate(null, "0.03", "10", "1", "50000").calculatePrincipal(), "37204.6957");
38     }
39     @Test
40     //测试求时间公式
41     public void testCalculateYears() {
42         assertEquals(new Calculate("30000", "0.03", null, "1", "50000").calculateYears(), "18");
43     }
44     @Test
45     //测试求回报公式
46     public void testCalculateInvestment() {
47         assertEquals(new Calculate("20000", "0.025", "10", null, null).calculateInvestment(), "229669.3262");
48     }
49     @Test
50     //测试求还款公式
51     public void testCalculateRepayment() {
52         assertEquals(new Calculate("1000000", "0.0325", "10", null, null).calculateRepayment(), "9771.9029");
53     }
54     @Test
55     //测试输入非法字符
56     public void testCalculateinput() {
57         p = "adff";
58         assertTrue(new Calculate(p, i, n, c, f).isError());
59     }
60     @Test
61     public void testCalculateinput2() {
62         i = "1.2";
63         assertTrue(new Calculate(p, i, n, c, f).isError());
64     }
65     @Test
66     public void testCalculateinput3() {
67         n = "10.5";
68         assertTrue(new Calculate(p, i, n, c, f).isError());
69     }
70     @Test
71     public void testCalculateinput4() {
72         c = "1.5";
73         assertTrue(new Calculate(p, i, n, c, f).isError());
74     }
75     @Test
76     //测试输入为空
77     public void testCalculateCompoundInterest3() {
78         p = null;
79         assertTrue(new Calculate(p, i, n, c, f).getPrincipal()==0);
80     }
81     @Test
82     //测试字符串长度为0
83     public void testCalculateCompoundInterest4() {
84         p = "";
85         assertTrue(new Calculate(p, i, n, c, f).getPrincipal()==0);
86     }    
87     
88 }

测试结果均符合预期